body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: skyblue;
}

#title {
  font-size: 22px;
  font-weight: normal;
}


.box1 {
  width: 100px;
  height: 100px;
  background: url("../assets/img/vue.jpg") no-repeat;
  background-size: contain;
}

.box2 {
  width: 200px;
  height: 200px;
  background: url("../assets/img/react.png") no-repeat;
  background-size: contain;
}

.box3 {
  width: 300px;
  height: 300px;
  background: url("../assets/img/angular.jpg") no-repeat;
  background-size: contain;
}

